/Engine/Plugins/Importers/USDImporter/Source/UnrealUSDWrapper/Public/USDListener.h
Describes USD object changes by object path. The only difference to the USD data structures is that we store them by object path here for convenience, so the key can be "/" to signify a stage change, or something like "/MyRoot/SomePrim" to indicate a particular prim change
typedef [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [TArray](API\Runtime\Core\Containers\TArray)< [FSdfChangeListEntry](API\Plugins\UnrealUSDWrapper\FSdfChangeListEntry) >> FObjectChangesByPath